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. Author manuscript; available in PMC: 2019 Jul 29.
Published in final edited form as: J Occup Environ Hyg. 2017 Aug;14(8):585–595. doi: 10.1080/15459624.2017.1304645

Table 1.

Coefficient of variation = (SD/Arithm.Mean) × 100% for the data presented in Figure 3.

(a) 2 L min−1
Coefficient of variation, CV (%)
Time, hr MCE (3 µm) PTFE (1 µm) PTFE (3 µm) PC (3 µm)
1 26 45 41 37
2 25 52 55 37
4 50 7 24 9
8 53 34 41 26
(b) 4 L min−1
Coefficient of variation, CV (%)
Time, hr MCE (3 µm) PTFE (1 µm) PTFE (3 µm) PC (3 µm)
1 35 34 24 32
2 39 38 37 49
4 26 30 32 37
8 40 26 52 45